I don't like and I don't use the term ley lines.... there's too much rubbish printed about these imaginary lines that join up somewhat random points on a map ... random theory means that you can see patterns in just about anything you can draw straight lines between.
Lines of force are found with dowsing and these are the ones that, once you have found them, you can mark on a plan and see where they go. It is these lines of force that bees find attractive and other things tend to concentrate on.
As for bees having magnets in their brains ... well ... perhaps not altogether in their brain but here you go:
https://www.nature.com/articles/srep23657
Very interesting stuff.
Now I would not dispute for a moment that bees can detect electromagnetism, that is after all how they sense how long it was since a flower was previously visited by another bee. I suspet they so this with their anteaters (sorry no proof).
I do not disputed the findings in this study are of interest, but..... No bees were exposed, strictly speaking to magnets. In the various experiments they were all exposed to electromagnetic fields that were forming and collapsing.
Look at theses quotes:
"The square coils were
turned on/off to change the magnetic azimuth every 5 minutes during the stimulus period"
(By azimuth I assume they mean the orientation of the field, I don't see how turning it on and off would change that).
"To examine the magnetic sensing capability of the honey bee, a magnetic field generator was built to deliver
short pulses of magnetic fields to the body of the honey bee"
"The CS (
5 Hz of alternating field for 10 s) was a magnetic stimulus and the unconditioned stimulus (US) was a 50% sucrose reward."
So I do not think it is anything like the magnetic navigation of pidgins where by the placement of a magnet has an obvious effect. I suspect that many small creatures would respond to such stimulus.
The bit about only older bees responding was interesting, but just speculation.
I think the title of this study is misleading, and is the work of a typical bunch of biologists. Trust me - I have a background in electronic engineering and work with a bunch of very clever biologists that do study's on bugs. So I know what they are like, most don't know a volt from an amp.
A better title would have been:
Electromagnetic Flux Sensing through the Abdomen of the Honey bee
Regarding the force lines you speak of, obviously the earth has a field. But the experiment in no way simulates the kind of field you would find naturally.
I would very much like to go dowzing with you and see if I could sense one of your confirmed lines. And would like to bring another person who says they can dows to see if they can find your line without you showing them first.
I am still doubtful about the validity of dowsing but would still give it another go.
I am also tempered try some magnate experiments on bees.
Changing the topic again,
For the esoteric among you, I once ran a little experiment on the side at work. If anyone has heard of the "21 grams experiment". Well I tried this experiment on bees. If you seal 100 bees in an airtight vessel, then freeze them, wait for them to die, microwave them or roast them. Then reweigh, the weight goes down. I have repeated this experiment with various vessels, killing the bees in various ways. And the weight always goes down. You will need a 4 digit balance to detect the difference with 100 bees. I actually produced an estimate for the weight of a bee sole. Unfortunately all the notes for this obviously valuable research have been lost.
I would like to add, all the bees I used had already been used in other experiments and had been exposed to chemicals, so could not be returned to the hive.